*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:#f8fafc;color:#0f172a;font-size:14px}
.app{display:flex;min-height:100vh}
.side{width:250px;background:#1e293b;color:#cbd5e1;flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto}
.brand{background:#0f172a;color:#fff;font-weight:700;font-size:20px;padding:18px 20px;display:flex;align-items:center;gap:10px}
.logo{background:#3b82f6;border-radius:50%;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;font-size:13px}
.side h6{margin:18px 20px 6px;font-size:11px;letter-spacing:.08em;color:#94a3b8;font-weight:500}
.side a,.side summary{display:block;padding:10px 14px;margin:2px 10px;border-radius:8px;color:#e2e8f0;text-decoration:none;cursor:pointer;list-style:none}
.side a:hover,.side summary:hover,.side a.on{background:#334155}.side a.on{box-shadow:inset 0 0 0 1px #3b82f6}
.side details a{padding-left:34px;font-size:13px}
.wrap{flex:1;min-width:0}
.top{background:#fff;border-bottom:1px solid #e2e8f0;padding:12px 24px;display:flex;justify-content:flex-end;align-items:center;gap:10px}
.av{background:#dbeafe;color:#2563eb;border-radius:50%;width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:12px}
.main{max-width:1100px;margin:0 auto;padding:28px 24px}
h1{margin:0 0 4px;font-size:28px}.sub{color:#64748b;margin:0 0 22px}
.card{background:#fff;border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,.07)}
.card h3{margin:0 0 14px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:20px}
.stat{background:#fff;border-radius:12px;padding:18px;box-shadow:0 1px 4px rgba(0,0,0,.07);color:#475569}
.stat b{display:block;font-size:28px;margin-top:6px;color:#0f172a}
.hero{background:linear-gradient(90deg,#4f46e5,#4c1d95);color:#fff;border-radius:12px;padding:26px;margin-bottom:20px}
.hero h2{margin:0 0 6px}
table{width:100%;border-collapse:collapse}th{background:#f1f5f9;text-align:left;font-size:12px;letter-spacing:.05em;color:#64748b;text-transform:uppercase}
th,td{padding:10px 12px;border-bottom:1px solid #f1f5f9;text-align:left}
input,select,textarea{padding:9px 11px;border:1px solid #cbd5e1;border-radius:8px;font:inherit;max-width:100%}
.btn{display:inline-block;padding:9px 16px;border:0;border-radius:8px;background:#4f46e5;color:#fff;cursor:pointer;font:inherit;text-decoration:none}
.btn.g{background:#fff;color:#0f172a;border:1px solid #cbd5e1}.btn.r{background:#dc2626}.btn.o{background:#16a34a}.btn.s{padding:5px 10px;font-size:12px}
.key{background:#f1f5f9;padding:14px;border-radius:8px;font-family:monospace;word-break:break-all;margin-bottom:14px}
.tag{padding:3px 10px;border-radius:99px;font-size:12px;font-weight:600;background:#fef9c3;color:#854d0e}
.tag.ok{background:#dcfce7;color:#166534}.tag.bad{background:#fee2e2;color:#991b1b}
.flash{padding:12px 16px;border-radius:8px;margin-bottom:18px;background:#dcfce7;color:#166534}.flash.err{background:#fee2e2;color:#991b1b}
pre{background:#0f172a;color:#86efac;padding:16px;border-radius:10px;overflow:auto}
code{background:#f1f5f9;padding:2px 6px;border-radius:4px;word-break:break-all}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:end}.row>div{flex:1;min-width:170px}.row input,.row select{width:100%}
label{display:block;font-size:12px;font-weight:600;margin:0 0 5px}
.scroll{overflow-x:auto}.cred{color:#16a34a;font-weight:600}.deb{color:#dc2626;font-weight:600}
.auth{max-width:420px;margin:6vh auto;padding:0 16px}.auth .card{padding:28px}.auth input{width:100%;margin-bottom:14px}
.auth h2{margin-top:0}#mb{display:none}
@media(max-width:800px){.side{position:fixed;left:-260px;z-index:9;transition:.2s}.side.open{left:0}#mb{display:inline-block;margin-right:auto}}

/* --- v2 design polish --- */
body{background:#f4f6fb}
.brand{background:#0b1220}
.side{background:linear-gradient(180deg,#1e293b,#131c2b)}
.logo{background:linear-gradient(135deg,#6366f1,#3b82f6)}
.side a.on{background:#2d3f5e;box-shadow:inset 3px 0 0 #6366f1}
.top{backdrop-filter:blur(6px)}
.card{border:1px solid #eef1f6;transition:box-shadow .15s}
a.stat{text-decoration:none;display:block;position:relative;transition:transform .12s,box-shadow .12s}
a.stat:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(79,70,229,.15)}
a.stat::after{content:'→';position:absolute;right:16px;top:16px;color:#94a3b8;font-size:18px}
.stat small.cap{display:block;color:#94a3b8;font-size:11px;letter-spacing:.06em;text-transform:uppercase;margin-top:4px}
.hero{background:linear-gradient(120deg,#4338ca,#6d28d9 60%,#be185d)}
.btn{box-shadow:0 1px 2px rgba(0,0,0,.08);transition:filter .1s}
.btn:hover{filter:brightness(1.08)}
.pill-row{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0 14px}
.pill{padding:6px 14px;border-radius:999px;background:#eef2ff;color:#4338ca;font-weight:600;font-size:13px;cursor:pointer;border:1px solid #e0e7ff}
.pill.on{background:#4338ca;color:#fff}
.svc-card{border:1px solid #eef1f6;border-radius:12px;padding:18px;margin-bottom:16px}
.svc-card h4{margin:0 0 4px}
.plan-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-top:12px}
.plan{border:1px solid #e2e8f0;border-radius:10px;padding:14px;text-align:center}
.plan b{display:block;font-size:20px;color:#4338ca;margin:4px 0}
.plan.active{background:#f0fdf4;border-color:#86efac}
.badge-sub{background:#ede9fe;color:#5b21b6;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600}

/* --- language switch --- */
.langsw{display:inline-flex;background:#f1f5f9;border-radius:999px;padding:3px;margin-right:4px}
.langsw a{padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;color:#64748b;text-decoration:none}
.langsw a.on{background:#4338ca;color:#fff}

/* --- API Hub cards --- */
.hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.hub-card{border-radius:14px;overflow:hidden;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06);display:flex;flex-direction:column}
.hub-head{background:linear-gradient(120deg,#4338ca,#3b82f6);color:#fff;padding:16px 18px;position:relative}
.hub-head h4{margin:0;font-size:19px}
.hub-head p{margin:4px 0 0;opacity:.85;font-size:12.5px}
.hub-price{position:absolute;top:14px;right:14px;background:#fbbf24;color:#78350f;font-weight:800;padding:4px 10px;border-radius:999px;font-size:13px}
.hub-body{padding:16px 18px;flex:1;display:flex;flex-direction:column;gap:10px}
.hub-row{display:flex;justify-content:space-between;align-items:center;font-size:13.5px}
.hub-row b{color:#1e293b}
.hub-method{background:#fde68a;color:#78350f;font-weight:800;padding:2px 10px;border-radius:6px;font-size:12px}
.hub-url{background:#f1f5f9;border-radius:8px;padding:8px 10px;font-family:monospace;font-size:12px;word-break:break-all;color:#4338ca}
.hub-plans{display:flex;gap:8px;flex-wrap:wrap}
.hub-plan-pill{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px}
.hub-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.hub-actions .btn{font-size:12.5px;padding:8px 12px}
.hub-demo{display:none;background:#0f172a;color:#86efac;font-size:12px;padding:10px;border-radius:8px;margin-top:8px;white-space:pre-wrap;word-break:break-all}